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<center><h1>BlackFilter.java</h1></center><p><br>

Below is the syntax highlighted version of <a href = "BlackFilter.java">BlackFilter.java</a>.
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<pre><tt><span class="comment">/******************************************************************************</span>
<span class="comment"> *  Compilation:  javac BlackFilter.java</span>
<span class="comment"> *  Execution:    java BlackFilter blacklist.txt &lt; input.txt</span>
<span class="comment"> *  Dependencies: SET In.java StdIn.java StdOut.java</span>
<span class="comment"> *  Data files:   </span><span class="url">http://algs4.cs.princeton.edu/35applications/tinyTale.txt</span>
<span class="comment"> *                </span><span class="url">http://algs4.cs.princeton.edu/35applications/list.txt</span>
<span class="comment"> *</span>
<span class="comment"> *  Read in a blacklist of words from a file. Then read in a list of</span>
<span class="comment"> *  words from standard input and print out all those words that</span>
<span class="comment"> *  are not in the first file.</span>
<span class="comment"> * </span>
<span class="comment"> *  % more tinyTale.txt </span>
<span class="comment"> *  it was the best of times it was the worst of times </span>
<span class="comment"> *  it was the age of wisdom it was the age of foolishness </span>
<span class="comment"> *  it was the epoch of belief it was the epoch of incredulity </span>
<span class="comment"> *  it was the season of light it was the season of darkness </span>
<span class="comment"> *  it was the spring of hope it was the winter of despair</span>
<span class="comment"> *</span>
<span class="comment"> *  % more list.txt </span>
<span class="comment"> *  was it the of </span>
<span class="comment"> * </span>
<span class="comment"> *  % java BlackFilter list.txt &lt; tinyTale.txt </span>
<span class="comment"> *  best times worst times </span>
<span class="comment"> *  age wisdom age foolishness </span>
<span class="comment"> *  epoch belief epoch incredulity </span>
<span class="comment"> *  season light season darkness </span>
<span class="comment"> *  spring hope winter despair </span>
<span class="comment"> *</span>
<span class="comment"> ******************************************************************************/</span>

<span class="preproc">package</span><span class="normal"> edu</span><span class="symbol">.</span><span class="normal">princeton</span><span class="symbol">.</span><span class="normal">cs</span><span class="symbol">.</span><span class="normal">algs4</span><span class="symbol">;</span>

<span class="comment">/**</span>
<span class="comment"> *  The </span><span class="keyword">&lt;tt&gt;</span><span class="comment">BlackFilter</span><span class="keyword">&lt;/tt&gt;</span><span class="comment"> class provides a client for reading in a </span><span class="keyword">&lt;em&gt;</span><span class="comment">blacklist</span><span class="keyword">&lt;/em&gt;</span>
<span class="comment"> *  of words from a file; then, reading in a sequence of words from standard input, </span>
<span class="comment"> *  printing out each word that </span><span class="keyword">&lt;em&gt;</span><span class="comment">does not</span><span class="keyword">&lt;/em&gt;</span><span class="comment"> appear in the file. </span>
<span class="comment"> *  It is useful as a test client for various symbol table implementations.   </span>
<span class="comment"> *  </span><span class="keyword">&lt;p&gt;</span>
<span class="comment"> *  For additional documentation, see </span><span class="keyword">&lt;a</span><span class="normal"> </span><span class="type">href</span><span class="symbol">=</span><span class="string">"http://algs4.cs.princeton.edu/35applications"</span><span class="keyword">&gt;</span><span class="comment">Section 3.5</span><span class="keyword">&lt;/a&gt;</span><span class="comment"> of</span>
<span class="comment"> *  </span><span class="keyword">&lt;i&gt;</span><span class="comment">Algorithms, 4th Edition</span><span class="keyword">&lt;/i&gt;</span><span class="comment"> by Robert Sedgewick and Kevin Wayne.</span>
<span class="comment"> *  </span>
<span class="comment"> *  </span><span class="type">@author</span><span class="comment"> Robert Sedgewick</span>
<span class="comment"> *  </span><span class="type">@author</span><span class="comment"> Kevin Wayne</span>
<span class="comment"> */</span>
<span class="keyword">public</span><span class="normal"> </span><span class="keyword">class</span><span class="normal"> </span><span class="classname">BlackFilter</span><span class="normal"> </span><span class="cbracket">{</span><span class="normal">  </span>

<span class="normal">    </span><span class="comment">// Do not instantiate.</span>
<span class="normal">    </span><span class="keyword">private</span><span class="normal"> </span><span class="function">BlackFilter</span><span class="symbol">()</span><span class="normal"> </span><span class="cbracket">{</span><span class="normal"> </span><span class="cbracket">}</span>

<span class="normal">    </span><span class="keyword">public</span><span class="normal"> </span><span class="keyword">static</span><span class="normal"> </span><span class="type">void</span><span class="normal"> </span><span class="function">main</span><span class="symbol">(</span><span class="normal">String</span><span class="symbol">[]</span><span class="normal"> args</span><span class="symbol">)</span><span class="normal"> </span><span class="cbracket">{</span>
<span class="normal">        </span><span class="usertype">SET&lt;String&gt;</span><span class="normal"> set </span><span class="symbol">=</span><span class="normal"> </span><span class="keyword">new</span><span class="normal"> SET</span><span class="symbol">&lt;</span><span class="normal">String</span><span class="symbol">&gt;();</span>

<span class="normal">        </span><span class="comment">// read in strings and add to set</span>
<span class="normal">        </span><span class="usertype">In</span><span class="normal"> in </span><span class="symbol">=</span><span class="normal"> </span><span class="keyword">new</span><span class="normal"> </span><span class="function">In</span><span class="symbol">(</span><span class="normal">args</span><span class="symbol">[</span><span class="number">0</span><span class="symbol">]);</span>
<span class="normal">        </span><span class="keyword">while</span><span class="normal"> </span><span class="symbol">(!</span><span class="normal">in</span><span class="symbol">.</span><span class="function">isEmpty</span><span class="symbol">())</span><span class="normal"> </span><span class="cbracket">{</span>
<span class="normal">            </span><span class="usertype">String</span><span class="normal"> word </span><span class="symbol">=</span><span class="normal"> in</span><span class="symbol">.</span><span class="function">readString</span><span class="symbol">();</span>
<span class="normal">            set</span><span class="symbol">.</span><span class="function">add</span><span class="symbol">(</span><span class="normal">word</span><span class="symbol">);</span>
<span class="normal">        </span><span class="cbracket">}</span>

<span class="normal">        </span><span class="comment">// read in string from standard input, printing out all exceptions</span>
<span class="normal">        </span><span class="keyword">while</span><span class="normal"> </span><span class="symbol">(!</span><span class="normal">StdIn</span><span class="symbol">.</span><span class="function">isEmpty</span><span class="symbol">())</span><span class="normal"> </span><span class="cbracket">{</span>
<span class="normal">            </span><span class="usertype">String</span><span class="normal"> word </span><span class="symbol">=</span><span class="normal"> StdIn</span><span class="symbol">.</span><span class="function">readString</span><span class="symbol">();</span>
<span class="normal">            </span><span class="keyword">if</span><span class="normal"> </span><span class="symbol">(!</span><span class="normal">set</span><span class="symbol">.</span><span class="function">contains</span><span class="symbol">(</span><span class="normal">word</span><span class="symbol">))</span>
<span class="normal">                StdOut</span><span class="symbol">.</span><span class="function">println</span><span class="symbol">(</span><span class="normal">word</span><span class="symbol">);</span>
<span class="normal">        </span><span class="cbracket">}</span>
<span class="normal">    </span><span class="cbracket">}</span>
<span class="cbracket">}</span>

<span class="comment">/******************************************************************************</span>
<span class="comment"> *  Copyright 2002-2015, Robert Sedgewick and Kevin Wayne.</span>
<span class="comment"> *</span>
<span class="comment"> *  This file is part of algs4.jar, which accompanies the textbook</span>
<span class="comment"> *</span>
<span class="comment"> *      Algorithms, 4th edition by Robert Sedgewick and Kevin Wayne,</span>
<span class="comment"> *      Addison-Wesley Professional, 2011, ISBN 0-321-57351-X.</span>
<span class="comment"> *      </span><span class="url">http://algs4.cs.princeton.edu</span>
<span class="comment"> *</span>
<span class="comment"> *</span>
<span class="comment"> *  algs4.jar is free software: you can redistribute it and/or modify</span>
<span class="comment"> *  it under the terms of the GNU General Public License as published by</span>
<span class="comment"> *  the Free Software Foundation, either version 3 of the License, or</span>
<span class="comment"> *  (at your option) any later version.</span>
<span class="comment"> *</span>
<span class="comment"> *  algs4.jar is distributed in the hope that it will be useful,</span>
<span class="comment"> *  but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="comment"> *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<span class="comment"> *  GNU General Public License for more details.</span>
<span class="comment"> *</span>
<span class="comment"> *  You should have received a copy of the GNU General Public License</span>
<span class="comment"> *  along with algs4.jar.  If not, see </span><span class="url">http://www.gnu.org/licenses.</span>
<span class="comment"> ******************************************************************************/</span>
</tt></pre>

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Last updated: Mon Mar 21 10:51:08 EDT 2016.
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